Introduction.— The success in designing spintronic and spinorbitronic devices relies on effects to generate, manipulate and detect spin-polarized currents. The Rashba spin-orbit coupling [1]}, [2]} has a special role in this context because it allows to directly tune the electron spin orientation through its propagation and, viceversa, to achieve a spin control of the electron trajectories [3]}, thus giving rise to a large variety of magneto-electric effects. The most notable manifestations are the spin Hall effect [4]}, [5]}, [6]}, [7]} as well as the direct and inverse Edelstein effects (EE and IEE) [8]}, [9]}, [10]}, with a magnetization being induced by an electric current or, conversely, a non-equilibrium magnetization leading to charge current, respectively.
